No. 2.— The Australian Ants of the Genus Onychomyrmecx. 
CONTRIBUTIONS FROM THE ENTOMOLOGICAL LABORATORY OF THE 
BUSSEY INSTITUTION, HARVARD UNIVERSITY. NO. 104. 
By Wiiu1amM Morton WHEE LER. 
Twenty years ago Emery described a singular ponerine ant taken by 
Podenzana on Mt. Bellenden-Ker, in Queensland, as the type of a 
new genus under the name of Onychomyrmex hedleyi, in honor of Mr. 
C. Hedley, a distinguished Australian naturalist. The worker, which 
was the only phase seen by Emery, exhibited an unusual combination 
of characters, especially in the shape of the mandibles, clypeus, 
petiole, and middle and hind tarsi, the terminal joints, pulvilli, and 
claws of which were conspicuously enlarged. He regarded the 
affinities of the genus as obscure. “Its mandibles and petiole,” he 
says, “recall the species of Amblyopone and related genera, but the 
frontal carinae, approximated and dilated in front, resemble those of 
Ponera and Leptogenys. The tibiae without spurs are not found in 
any other Ponerinae. The tarsi, with their enormous claws and pul- 
villi, have no analogue, to my knowledge, except in the Dorylinae 
(Aenictus, Anomma), but the insertions of the antennae and the 
structure of the thorax lead me to think that these resemblances do 
not indicate a true relationship.’ Ashmead (Can. ent., 1905, 37, 
p- 382) regarded the genus Onychomyrmex as constituting a distinct 
tribe of Ponerinae (Onychomyrmicini). In his recent revision of the 
subfamily in the “Genera Insectorum”’ (1911), Emery adopts Ash- 
mead’s name as that of a sixth and last subtribe in the tribe Ponerini. 
While collecting in the rich tropical “scrub” in the neighborhood 
of Kuranda, Queensland during the autumn of 1914, I succeeded in 
finding not only QO. hedleyi, which had not been recorded for nearly 
twenty years, but also two additional species of the genus. On 
returning to Boston I learned that Dr. E. Mjéberg had anticipated 
me in finding OQ. hedleyi and one of the other species, while he was 
collecting for the Swedish scientific expedition to Australia during 
1910-1913 and that Forel had just described the latter as 0. mjobergi. 
The third species is described in the following pages as 0. doddi, in 
